Volume 117, Number 3, February 2017
|Number of page(s)||3|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||23 March 2017|
Constant-roll inflation: Confrontation with recent observational data
1 Instituto de Física Corpuscular (IFIC), Universidad de Valencia-CSIC - E-46980, Valencia, Spain
2 Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo Tokyo 113-0033, Japan
3 L. D. Landau Institute for Theoretical Physics RAS - Moscow 119334, Russia
Received: 27 February 2017
Accepted: 10 March 2017
The previously proposed class of phenomenological inflationary models in which the assumption of inflaton slow-roll is replaced by the more general, constant-roll condition is compared with the most recent cosmological observational data, mainly the Planck ones. Models in this two-parametric class which remain viable appear to be close to the slow-roll ones, and their inflaton potentials are close to (but still different from) that of the natural inflation model. The permitted regions for the two model parameters are presented.
PACS: 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) / 04.20.Jb – Exact solutions / 98.80.Es – Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)
© EPLA, 2017
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